CVE-2026-49332: Openshift/oauth-proxy: underscore header smuggling enables identity impersonation on wsgi/php upstreams
Red Hat · Red Hat OpenShift Container Platform 4.12
Vendor fix available · Affected: Red Hat OpenShift Container Platform 4.12 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 45% of scored CVEs
DescriptionCVE.org
A flaw was found in openshift/oauth-proxy. The proxy sets authenticated identity headers using only dash-variant keys (X-Forwarded-User) but does not strip underscore-variant keys (X_Forwarded_User) from incoming requests. WSGI and PHP frameworks normalize both variants to the same variable, allowing an authenticated low-privilege user to smuggle a forged identity that may override the legitimate authenticated identity in the upstream application.
Affected products11
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Red Hat · Red Hat OpenShift Container Platform 4.12Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.13Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.14Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.15Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.16Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.17Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.18Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.19Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.20Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.21Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.22Versions not stated
On the Atlas
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CoverageNo articles yet
No CyberSIXT article names CVE-2026-49332 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.
References
- NVD entrynvd.nist.gov
- CVE recordcve.org
- Weakness CWE-436cwe.mitre.org
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- access.redhat.com/security/cve/CVE-2026-49332access.redhat.com
1 more reference is in the CVE record.